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The optimum layout of urban system is one of important contents in urban planning. To make regional urban system planning more suitable to the requirements of urbanization development, this paper tests a quantitative method based on GIS & Voronoi diagram. Its workflows include calculating city competitiveness data, spreading the city competitiveness analysis by aid of spatial analysis and data...
Our previous studies showed that at a considerably high plating speed up to 1 mm/h, the nickel electrodeposits with smooth surface, few deposition defects and some improved properties could be prepared under the conditions of an additive-free bath at a reduced pressure of 5 kPa and a temperature gradient of 35°C/65°C. This paper aims at further analyzing the effect of bath pressure and temperature...
The BP network is widely accepted as a technology offering an alternative way to capture nonlinear patterns to complex real-world problem. In this article, BP neural network is used to identify the nonlinear relationship between salt & ash density and insulator flashover voltage which is very important in insulation operate state monitoring. The salt density and ash density are main contamination...
In he process of NC machining, the precise computation of machining graphical path is the key to guarantee machining precision. In curve fitting, it is difficult to fit curve just only using straight line. The combining both arc and line may get good fitting effect in fitting curve. But it leads to complicated calculation in fitting. Aiming at this problem, multi-dimensional fuzzy reasoning algorithm...
This paper has studied the friction of main bearing on an engine by combining the multi-body dynamics and hydrodynamic lubrication model. First, the basic equations and the application on AVL-Excite software platform of multi-body dynamics have been described in detail. Then, introduce the hydrodynamic lubrication model, which is the extended Reynolds equation derived from the Navier-Stokes equation...
Discussed in this paper are the challenges facing the boosting systems of Low Temperature Combustion (LTC) system. A new term named “Gas to Fuel Ratio (GFR) in cylinder” is introduced to deal with the combined dilution effect of fresh air and cooled external EGR. Formulas are derived to illuminate the fundamental relationship between engine BMEP and GFR targets, with the required mass flowrate and...
Aiming at the insufficiencies of traditional agricultural land grading methods, this study discussed the process and technical route of agricultural land grading based on decision tree analysis method and GIS, constructed an agricultural land grading model based on MATLAB and decision tree C4.5 algorithm. Furthermore, we took Luanwan village of Pingyin county in China for the empirical study, selected...
Most of the cities all over the world have the problem of traffic jam, but Beijing is probably one of the typical cities. Researchers and government have applied the energies to finding a solution to solve this problem in Beijing, but the effect is not satisfying. Space syntax theory and its mode to solve problems can provide instructive reference for analyzing the urban traffic problem. Based on...
Health monitoring of the hydropower turbine and timely identification of potential failure areas can prevent failure of the entire vertical axis hydropower turbine. A health monitoring system integrated within the turbine could locate blade failures, reducing hydropower turbine life-cycle costs and the costs of energy. System health management is a concerted effort with applicability to machinery...
An on line monitoring and diagnosis system for a modern power plant is essential as hydropower turbine failures are rarely single mode events. Normally, hydropower turbine deterioration is a slow process involving many factors. Cavitations are most severe, eventually forcing a shutdown for repair of affected parts. Cavitations phenomenon in an operating turbine are ubiquitous and unpredictable, and...
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